740 resultados para Contact Metamorphism
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Introducción. Los Contact Center son una tendencia global que cada vez se impone más en nuestro país, y el estrés es un factor común ligado a sus trabajadores alrededor del mundo. Materiales y métodos. Este estudio de corte transversal, evalúo desde tres perspectivas el estrés buscando hallar la prevalencia de estresores laborales y síntomas de estrés en 440 trabajadores de un Contac Center en Bogotá en el 2015, a través de la realización de las encuestas JCQ (Job Content Questionnaire), ERI (Effort Reward Imbalance Questionaire), y Cuestionario para la Evaluación del Estrés (Ministerio de Protección Social) comparando los hallazgos entre el grupo de operadores que usan y los que no usan el audífono en diadema. Resultados. La prevalencia total de estrés bajo fue del 13%, muy bajo del 83,8% y 3,2% no reportaron síntomas de estrés. No se encontraron niveles de estrés medio o alto. En las prevalencias de estrés según el uso de la diadema, se encontró un nivel bajo de estrés en el 25% de los que usan diadema, muy bajo en el 68% y 6,5% no presentaron síntomas de estrés; por el contrario, el grupo que no usa la diadema presento sólo el 1% de estrés bajo y el 99% de estrés muy bajo, no hubo participantes que no reportaran estrés. Estresores laborales como la autoridad de decisión y la percepción de recompensa variaron en ambos grupos. El riesgo al usar la diadema de tener un nivel de estrés bajo fue del OR 2,32 IC95%(1,56-6,09), mostrando que al usar la diadema se tiene un doble de riesgo de bajo estrés en trabajadores operativos de Contact Center frente a presentar un estrés muy bajo. Conclusiones. La prevalencia de estrés general fue baja en ambos grupos evaluados. Las mujeres, los jóvenes y participantes estrato 2 y 3 fueron los grupos predominantes. Hay dos veces mayor riesgo al usar la diadema de tener estrés bajo en trabajadores operativos. Se recomienda mayor seguimiento por parte de los Contac center a los estresores y síntomas de estrés a los que están expuestos sus trabajadores por lo que se requiere promover más estudios que sirvan de soporte para evaluar la diadema como factor estresor laboral.
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Crédito común para Secundaria Obligatoria en el cual se pretende profundizar en las estructuras idiomáticas propias para presentarse a uno mismo, y a otras personas, e introducir elementos de la realidad francesa en el contexto educativo de los alumnos. Se proponen 9 grupos de actividades de aprendizaje destinadas a potenciar los siguientes aspectos: comprensión de la lengua del profesor, participación dinámica en la clase, contactar con la realidad francesa, apropiación de la lengua, reconocimento de la lengua oral en el texto escrito y viceversa, y reconocimiento de elementos fonéticos y prosódicos en la lengua oral.
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Resumen tomado de la publicación. Monográfico con el título: Competencias básicas en el marco de la convergencia europea
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Resumen tomado de la publicación
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A number of recent experiments suggest that, at a given wetting speed, the dynamic contact angle formed by an advancing liquid-gas interface with a solid substrate depends on the flow field and geometry near the moving contact line. In the present work, this effect is investigated in the framework of an earlier developed theory that was based on the fact that dynamic wetting is, by its very name, a process of formation of a new liquid-solid interface (newly “wetted” solid surface) and hence should be considered not as a singular problem but as a particular case from a general class of flows with forming or/and disappearing interfaces. The results demonstrate that, in the flow configuration of curtain coating, where a liquid sheet (“curtain”) impinges onto a moving solid substrate, the actual dynamic contact angle indeed depends not only on the wetting speed and material constants of the contacting media, as in the so-called slip models, but also on the inlet velocity of the curtain, its height, and the angle between the falling curtain and the solid surface. In other words, for the same wetting speed the dynamic contact angle can be varied by manipulating the flow field and geometry near the moving contact line. The obtained results have important experimental implications: given that the dynamic contact angle is determined by the values of the surface tensions at the contact line and hence depends on the distributions of the surface parameters along the interfaces, which can be influenced by the flow field, one can use the overall flow conditions and the contact angle as a macroscopic multiparametric signal-response pair that probes the dynamics of the liquid-solid interface. This approach would allow one to investigate experimentally such properties of the interface as, for example, its equation of state and the rheological properties involved in the interface’s response to an external torque, and would help to measure its parameters, such as the coefficient of sliding friction, the surface-tension relaxation time, and so on.
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This article explores the impact of wider social contact on the experience of Chinese postgraduate students of adaptation to life in the UK. Focus group and individual interviews were conducted with a group of 11 Chinese students on an MA programme at a university in southern England and individual interviews with three representatives of a local volunteer group (LVG) offering support to the Chinese students. Although it was perceived that the students’ support needs were not adequately met by the University, the additional support offered outside the University was unanimously valued and considered as enriching their cultural and linguistic experiences and meeting their expectations. However, frequent social contact with the LVG, whose members were mostly Christians, also had an impact on their values, religious beliefs and identities. In a discussion framed within the sociological perspective of proselytization or religious conversion and the broad framework of international education and globalization, the different responses to this contact are described in terms of believers, doubters, empathisers and commentators. Implications are considered for universities, people involved in providing social support for international students, and sponsors of international students.
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This review looks at the work carried out over the past 15 years on membrane distillation and reports the conditions utilized for research. The process is still used mainly at the laboratory scale, but a few pilot plants have been built across the world, mostly for desalination and the production of potable water. Studies into membrane distillation have been concerned with the effect of mass transfer, heat transfer, and stirring rate, but the most important effect that has to be considered with this process is temperature polarization. A section on temperature polarization and the effect of boundary layers is included in this review.
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We have calculated the equilibrium shape of the axially symmetric Plateau border along which a spherical bubble contacts a flat wall, by analytically integrating Laplace’s equation in the presence of gravity, in the limit of small Plateau border sizes. This method has the advantage that it provides closed-form expressions for the positions and orientations of the Plateau border surfaces. Results are in very good overall agreement with those obtained from a numerical solution procedure, and are consistent with experimental data. In particular we find that the effect of gravity on Plateau border shape is relatively small for typical bubble sizes, leading to a widening of the Plateau border for sessile bubbles and to a narrowing for pendant bubbles. The contact angle of the bubble is found to depend even more weakly on gravity.